1 files changed, 31 insertions, 0 deletions
diff --git a/tools/ovl_offset.pl b/tools/ovl_offset.pl
new file mode 100644
index 0000000000..89c3468556
--- /dev/null
+++ b/tools/ovl_offset.pl
@@ -0,0 +1,31 @@
+#!/usr/bin/perl
+
+# Calculate the highest possible location for an overlay based
+# on a reference map file (.refmap)
+
+sub map_scan {
+    my ($map) = @_;
+    my $ramstart = -1, $ramsize = -1, $startaddr = -1, $endaddr = -1;
+    open (MAP, "<$map");
+    while (<MAP>) {
+        if ($_ =~ /^PLUGIN_RAM +0x([0-9a-f]+) +0x([0-9a-f]+)$/) {
+            $ramstart = hex($1);
+            $ramsize = hex($2);
+        }
+        elsif ($_ =~ / +0x([0-9a-f]+) +_?plugin_start_addr = ./) {
+            $startaddr = hex($1);
+        }
+        elsif ($_ =~ / +0x([0-9a-f]+) +_?plugin_end_addr = ./) {
+            $endaddr = hex($1);
+        }
+    }
+    close (MAP);
+    if ($ramstart < 0 || $ramsize < 0 || $startaddr < 0 || $endaddr < 0
+        || $ramstart != $startaddr) {
+        printf "Could not analyze map file.\n";
+        exit 1;
+    }
+    return $ramstart + $ramsize - $endaddr;
+}
+
+printf map_scan($ARGV[0]) & ~0xf;